1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742239ba3ec3683045990e18c5e7dceb550578645c195905797aee2b31e55f69. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424e9c3c-ae24-48ec-9ac3-eba9ddbc7725.json and https://artists.proofprofile.net/proofs/artist/424e9c3c-ae24-48ec-9ac3-eba9ddbc7725.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2d785d77af889cfb9bf75421b92f993fc68420503a80e69296fa27d789d435. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BAA052027441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce08769c9a7888063ef97323b58d7c8bcf89fa4e5796f2b914fa80c2405025b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RSA222300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccc45211ad99266f121e869a4eb5c0f345a2f59553ab0c09bc9578390a2df9b. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RSA222301226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc3d993d1066ceb796c1c8c6b703f1310833f5c6d1d2c26f1cc52eb53269e9b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RSA222301229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f4c8d7ed298a25c0009227f96fe6234d5ed5c63b32c520d919b7247c7fb51. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560812414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2af58f1ccc58dc285ddae054e0966475aaec424cce004d7f00ced4f99984e62. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560812418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b95fcfc8fb5a16064d06aa46e9acb728d566f51fa1b5e67e679752aa71ac6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE1359675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8cbf37daf27be21973c1449a4892ace973c14d2ba0e0a1cfd68664efc93898. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RSA222010141.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84296211cdb36ba129a601c365248671ea9ae9d71393cb40662d4790489c4def. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RSA222312332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f2b64c27ad2f9ffeab3a8abeaa69248fd4f65dc62b5ff2a3aae30c2b291f9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2581669.